Combination jolt-ramming and rock-over machine.



W. C. NORCROSS.

COMBINATION JOLT RAIMMING AND ROCK OVER MACHINE. APPLICATION FILED AUG.10. 1917.

Patented Apr. 30, 1918.

3 SHEETS-SHEET 1.

W. C. NORCROSS. COMBINATION J'OLT RAMMING AND ROCK ove n MACHINE.

APPLICATION FILED AUG-10.19M-

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3 SHEETSSHEET 2.

W. C. NORCROSS.

COMBINATION JOLT RAMMING AND ROCK OVER MACHINE.

. APPLICATION FILED Aue.| 0. 1912.

Patented. Apr. 30, 1918.

3 SHEETS-SHEET 3.

fioarllz'r ze WILLIAM C, NQRCLROSS, 01? TERREI'IAUTE, INDIANA.

COMBINATION JOLT-RAMMING AND ROCK-OVER MACHINE.

inseam. Y

Specification of Letters Patent.

Patented Apr. 30, 191%.

Applicationfiled,August 1Q, 1917. Serial No. 185,471.

To all whom it may concern:

Be it known that 1, WILLIAM C. Noaonoss,

a citizen ofthe United States, residing at Terre Haute, county of Vigo,and. State of Indiana, have invented certain new and useful Improvementsin Combination Jolt- Raimning and Roclr- Over Machines, of whichthefollowing is aspecification.

This invention relates to combination joltramming and rock-over machinesof the class set forth, for instance, in my Patent No. 1,224,407, May 1,1917, and application Serial No. 138,204 filed December 21, 1916.

Among the principal mechanical. problems in machines of this class areto devise rockover or lever mechanisms which will minimize Shocker jarwhen the table rocks past the vertical position either when swingingthev mold over to position it for drawing,

or, on return of the rock-over table after the mold has been drawn. Theweight carried by the roclcovor table is frequently considerable and,with increase in weight, the tendency toward shock or ar increases.

Another ditliculty encountered is the tendency to cramp the piston whichsupports the mold table during the rock-over operation, due to thedifliculty in devising a mechanical movement wherein the pivots of theswinging parts will be so related as to prevent side thrust.

The present invention, which embodies improvements on the machines of myaforesaid application and patent, has for its object the provision ofrock-over means of improved construction, relationship of parts andnovelty of operation, whereby the foregoing difficulties are verylargely, it not entirely, overcome. The rock-over mechanisn is soconstructed and arranged that during one part of the rock-over movementof the table, the swing is sustained a given pivotal point but issubsequently transferred to another pivotal. point and, combinedtherewith, is a rockable mounting for the aforesaid pivotal points, theobject being to have thesustaining pivotal points and the pivotal pointwhere the lever is connected to the .rock-over table, as nearly aspossible in a verticalline duringthe different positions of the partswhen the table is rocking over to drawing or return position, and togradually take up the shock or thrust on the pivotal points,,particularlywhen the point of rocking is transferred,automatically. asit were, from one pivotal point to another, at thetime when the tableisnearly vertical.

.My improvements.minimize cramping of the piston and aitorda more or.less shocklcss action when thetablc passes the vertical position, inrocking over,

I combine with the jolting table or. piston head of the jolt-rannningmachine,abalancing cylinder whose .pistonhas a vertical motion whichprevents sudden movement oi thejolting table and the rock-overtable dueto careless operation.

There is also provided a safetycushion stop which is adapted to preventshock at the end of the piston travel. and to assist in; starting theload over when the air pressure is released. Guiding means, in the formof apin carried by the piston and operating in a guide on the cylinder,may be used.

Asa part of the rock-over mechanism, there is provided a settable, oradjustable, abutment whose arrangement can be varied to permit early orlater transference of the pivotal point sustaining the rock-over action, according to the load which is being carried by the rock-overtable. With alight load, the time of transference from one pivotal pointto the other occurs when the rockover table is almost at right anglestothe jolt-table or piston head, whereas with a heavy load, thistransference should. occur before the rock-over table assumessubstantially vertical position.

In the present application there is shown and describedan improvedoperating system for a drawing table which is adapted for use inconnection with the present invention but as that system and drawingtable are just as well adapted for use with other jolt-ramming androck-over. machines as the present one, the improved operating systemfor the drawing table forms the subject matter for an. applicationexecuted of even date herewith.

An automatic valve, not shown, is pro vided for, causing the. piston. tojolt the mold. Avalve such as shown in my Patent No. 1,224, iO7, or,application Serial No. 138,204, or, application Serial. No. 126,846filed October 21, .1916, may be used.

The embodiment of the invention which is ples thereof and istobeconsiderecLthere ted lines showing the piston elevated beyond normallimit and the bell-crank lever being locked by the dog;

Fig. 2, is a similar view, full lines showing the piston again lowered,the rock-over table and mold approaching vertical position, and theparts positioned just before the rock-over action is transferred fromone pivot to another; dotted lines representing the rock-over table andmold completely rocked over, the rocker shifted, and the drawing tableelevated to drawing position;

Fig. 3, a front elevation;

' Fig. i, detail of the rock-over dog;

7 Fig. 5, a detail plan view of the link; Fig. 6, a longitudinal sectionthereof; Fig. 7, a longitudinal section of the rocker or shock absorber,and

Fig. 8, a plan view thereof.

The machine has a base 1 which supports cylinder 2 having a valvecontrolled inlet pipe 3 and a valve controlled exhaust pipe 4:.Operating in the cylinder is a piston 5 which carries the main table 6and the supplemental or rock-over table 7, which is hinged thereto at 8.To admit the fluid pressure to the bottom of the cylinder 2 beneath thelower end of the piston 5, there is provided a pipe 9, having athree-way valve 10. The valve 10 remains closed during the normalreciprocation of the piston 5 when the mold is being jolted, the valvesof the pipes 3 and t then being open. When the mold has been jolted orrammed, the valves in the pipes 3 and t are closed, so that the pistonis then subject to pressure entering through the pipe 9 or exhaustingthrough said pipe, according to manipulation of the valve 10. Bymanipulating the valve 10 the operator can elevate the piston 5 or lowerit as desired, to thereby bring about the different positions of thelever mechanism, to cause rocking over of the table 7 and its return.

The piston and main table, or head 6, may be guided or prevented fromturning by a pin 11 carried by the table and operating in a guide 12.

The automatic valve which controls the reciprocations of the piston 5 isnot shown but it may be like the valve of my aforesaid application andpatents.

To cushion the piston at the end of its travel and also to assist instarting the -load over when the air pressure is released from thecylinder 2, I provide a safety bolt 13 which is carried by the table 6and slides through an opening in the flange or head 14c of the cylinder.011

this rod is a sleeve or cup 15 which rests on a washer and nut 16 andcontains a coil spring 17 whose upper end projects beyond the cup. Thespring 17 engages the collar or head it and cushions the movement of thepiston at the end of its travel, until the end of the sleeve or cup 15engages the head ll as shown by dotted lines. The device then serves asa stop, the table 7 being rocked over and arrested in that position,ready for the mold to be drawn, as shown by dotted lines in Fig. 2.

To prevent sudden movement of the piston due to careless operation,there is provided a balancing cylinder 18 whose piston 19 has a slot andbolt connection 20 with the table 6. The slot is long enough to permitthe normal play of the piston 5 when ramming the mold but when therock-over operation begins, sudden movements of the piston 5 areprevented. The cylinder 18 contains a piston connected to rod 19 andoperating in oil,

One or two of the rock-over mechanisms now to be described may beemployed, but only one need be used. A rocker 21, having an are shapedlower face, rests on the bed and is provided with a tapered opening 22through which passes a bolt 23 which holds it to the bed or base and yetpermits it to rock. The rocker has a stop 24: and ears A link, Figs. 5,6, which is shown at 26, is pivoted to the ears on a bolt or pin 27 andis adapted to rest on the stop or lug Carried by the link 26 is a stop28 which is in the form of a rectangular nut secured by a bolt, pin orother fastening 29 which passes eccentrically through it, as shown inFig. 6. The face 30 of the stop is the effective abutting face as willpresently appear. The different faces 31, 32, 33 are at differentdistances from the pin 2%). According to which of the faces 80, 31, 32,33, is in the position occupied by the face 80, Fig. 6, there will bedetermined the point or time in the elevation of the rock-over tablewhen the pivot 27 will constitute the pivotal point of the rock-overmovement. If the load is light, the surface 30 will be used as theabutting surface, to enable the rock-over table 7 to assume a nearlyvertical position before the pivot 27 becomes the rock-over center. Ifthe load be heavy, one or the other of the surfaces 31, 3a, 33 will beused, the stop 28 being turned, or set, for that purpose.

The rock-over lever 31- is pivoted to the link 26 at 35. During thefirst part of the rock-over movement and the last part of the returnmovement of the table 7, the pivot 35 is the rock-over center. Fivotedat 36 to the lever 3-l is a bell-crank lever 37 which is pivoted at 38to the rock-over table 7. The free end of the bell-crank lever 37 has aclaw or catch 39.

During normal jolting of the tables 6 and 7 to ram the mold there is norocking of the lever 37.. The lever 34 t'hen swings on the pivot 35 andlever 37 on the pivots 36, 38. The link 26 is then resting on the stop24. I Pivoted to the lever is a weighted dog or catch 40 which has ashoulder 41 adapted to lock'with the catch 39. of the lever: 37

. when the piston has been elevated far enough, as shown by dotted lineposition in Fig. 1 Pivoted-to the lever 34 is 'a dog 42, Fig. 4, whichhas a catch' or shoulder, preferably claw, 43.. .The upper branch of theclaw 43 rests upon the upper face of the stop 28, thereby preventing thedog 42 from falling, The eifective locking shoulder of the dog is thepart 43 which is normally separated by a suitable space from the step.28, the face for instance, so thatthere will be no engageinent duringjolting the mold nor until the piston has been run up to causethepartsto assume the full line position of-Fig. 2. Consequently, thepiston "maybe elevated to cause the lever 37 tolock with the dog 40 without anyengagement of the shoulder 43 and stop 28 as shown by dotted linesFig. 1. The air may then be released. from the cylinder 2, whereupon thepiston 5 will descend and the lever 34 will rock on pivot to bring therock-over table 7 to the full'line position, Fig. 2; before the shoulder43 will engage the stop 28. Air being again admitted to the cylinder 2,the piston will rise but now the lever 34 is rigid with the link 26 andconsequently the center of rocking is transferred to the pivot 27.Thetable7 and mold finally assume the inverted position shown bydottedlines Fig. 2.

For the purpose of releasing thedog from the lever 37 there is provideda wire or cable 44 connected to the dog and running around a pulley 45on the dog 42, thence to an operating handle 46, Fig. If two rock-overmechanisms are used, the other dog 40 will be connected to the handle 46by awire or cable 44 running around a and air, though shown herein, isset forth and claimed 'in another application Serial No. 185,472executed of even date herewith. The drawing table 46 is supportedandoperatedby a piston 47 which operates in a cylinder 48.'l. The pistonis elevated, or allowed to descend by the actionfofoil contained in areservoir 49, pipe 50 and cylinder 48 Air pressure is admitted to thereservoir 49 through apipe 51 under the control of a three-way valve 52.A stop cock 53 is provided in the pipe 50. Air being admitted to thereservoir 49 by turning three-way valve 52, the oil is forced throughthe pipe 50 and elevates the piston 47, thereby running the drawingtable 46 up to the mold 54. vWhen the leveling drawing table 46 takes ahearing against the follow board of the mold 544, the stop cock 53 isclosed by the operator. The air is then released by turning the threewayvalve 52 When the clamps are re moved from the mold 54, the operatoropens the cook 53 and the oil in the. cylinder 48 sure, the oil but forthe presence of valve 53 would he forced back into the reservoir 49before the operator wasready to draw the mold.

tionally shown in Figs. 1 and 2. Inpractice Y these valves, the. valves52, 53, and the handle 46 will be grouped for convenience of operation.

, Operation: The valves controlling pipes 3 and 4 are first opened, thevalve 10 being closed The piston 5 will then automatically rise and fallto ram or. jolt the. mold 54. hen the mold has been suitably olted, the

valves for pipes 3, 4, are closed andthe rockover of the mold iseffected by manipulating the three-way valve 10. Referringto Fig. 1,pressure is admitted beneath piston 5 to raise it until the dog 40latches with the bellcrank lever 37 as shown in dotted lines. The valve10 then. turned to release the air. The piston, tables, andmold, arethen sup ported by the pivot 35, the link 26 resting upon lug 24 and therocker 21 being in the position shown bylful'l lines, Fig. 1. It will beobserved. that, the pivot 35 is but a short distance offset from avertical line running through the pivot 38 so that a nearly direct liftis obtained and the usual tendency to cramp the piston 5 is minimized,On the release of. the air, the piston descends to the full line)osition in Fig. 2. The lever 37 being locked to. the lever 34, thetable 7 and the mold 54 are rocked, on pivots 35 and 8,

to the full line position, 2., ,The pivots 38 and 35am now insubstantially the same vertical line, just prior tothe table 7 assumingvertical position. The travel of the the link 26, consequentlyythecenter o fl-the lever 34 has now brought the dog 42 tothe rocking actionis transferred from the pivot 35 to the pivot 27. Air being now admittedunder piston 5, the latter rises and the table 7 is swung toward avertical position. This is the point where shocks and jars are thegreatest just as the table 7 rocks past the vertical position. Thetransfer of the point of swinging from 35 to 27 is accompanied by arocking movement of the rocker 21 from the full line position to thedotted line position, Fig. 2, the link 26 lifting from the lug 24:. Theshock of the rock-over is thus minimized. The piston having lifted toextreme extent, the cushion spring 17 engages the head 14:, cushioningthe descent, in inverted position, of the table 7 and mold 5 1 to thedotted line position Fig. 2 until, finally, the sleeve 15 abuts theflange or head 1 1 and arrests the parts. The drawing table is then runup, dotted line position, Fig. 2, and the mold drawn as beforedescribed. 7

The mold having been drawn, the pressure is released through the valve10 and the piston 5 lowers whereupon a reversal of the foregoingoperations is carried out. In returning the table 7 back to the fullline position of Fig. 2, the link 26 rests on the lug 24B and the shockof the return of the table 7 past vertical position is absorbed by therocking of the rocker 21 back to the full line position, Fig. 2.Pressure is now admitted and the piston 5 raised. The dog 12 becomesfreed from the stop 28 and the parts finally assume the dotted lineposition, Fig. 1. The handle 46 is now operated to re- 7 lease the dogs4L0 l0 from the levers 87.

Pressure is again released through valve 10 and the parts then assumethe full line position Fig. 1.

7 When valves in the pipe 3, 4, are opened,

the piston 5 will reciprocate for j olting another mold.

a rock-over table carried thereby, and rockover means for said tablehaving a fulcrum adapted to automatically shift in a general transversedirection relative to the jolting carrier, during the rocking over ofsaid table said fulcrum being located separate from said carrier andtable.

3. A combination jolt-ramming and rockover machine comprising a joltrock-over table, an articulated lever having a pivotal Valve 10 is thenclosed.

connection with said table, means for releasably locking the parts ofthe lever together, and a shiftable supporting fulcrum for said lever.

4. A combination jolt-ramming and rockover machine comprising a joltrock-over table, an articulated lever having a pivotal connection wi hsaid table, means for releasably locking the parts of the levertogether,

.and a supporting fulcrum for said lever which is arranged toautomatically shift during the rocking over of said table.

5. A combination jolt-ramming and rockover machine comprising a joltrock-over table, an articulated lever having a pivotal connection withsaid table, means for releasably locking the parts of the levertogether, a link pivoted to said lever and itself having a supportingfulcrum, said lever being adapted to swing on its pivotal connectionwith the link during a portion of the rocking over of the table, andmeans for coupling the lever and link together during another portion ofthe rocking over movement to transfer the pivotal point of the lever tothe fulcrum of the link.

6. A combination jolt-ramming and rockover machine comprising a joltrock-over table, an articulated lever having a pivotal connection withsaid table, means for releasably locking the parts of the levertogether, a link pivoted to said lever and itself having a supportingfulcrum, said lever being adapted to swing on its pivotal connectionwith the link during a portion of the rocking over of the table, and adog carried by the lever which is normally free from the link, said dogbeing adapted to couple the lever to the link during another portion ofthe rocking over movement to transfer the pivotal point of the lever tothe fulcrum of the link.

7. A combination jolt-ramming and rockover machine, comprising a joltrock-over table, a rocker, and an operative connection between therock-over table and said rocker.

8. A combination jolt-ramming and rockover machine comprising a joltrock-over table, a rocker, and a lever pivoted to the table and to therocker.

9. A combination j olt-ramming and rockover machine comprising a joltrock-over table, a rocker, and an articulated lever having means forreleasably locking its parts together, said lever being pivoted to therock-over table and to the rocker.

10. A combination jolt-ramming and rock-over machine comprising a joltrockover table, a rocker, and a lever pivoted to the rock-over table andhaving a shiftable fulcrum on the rocker.

11. A combination jolt-ramming and rock-over machine comprising a joltrockover table, a rocker, a link pivoted to the rocker, and adapted toengage therewith,

insane? and a lever pivoted to the rock-over table and to the link;

12. A combination joltramming and rock-over machine comprising a joltrockover table, a rocker, a link pivoted to the rocker and adapted toengage therewith, a lever pivoted to the rock-over table and to thelink, and a dog adapted to couple the lever to thelink after the tablehas swung a part of its rock-over movement to thereby transfer thesupport of the lever from its pivotal connection with the link to thefulcrum of said link.

13. A combination jolt-ramming and rock-over machine, comprising a joltrockover table, a rocker, a link pivoted to the rocker and adapted toengage therewith when in one position, a lever pivoted to the rock-overtable and to the link, a dog carried by the lever, and an adjustableabutment carried by the link with which the dog is adapted to engagewhen the link is in another position.

14. In a combination jolt-ramming and rock-over machine, the combinationwith a reciprocating jolting carrier, and a rockover table carriedthereby, of means for rocking over said table, and a balancing pistonand cylinder having a direct positive connection with the joltingcarrier which permits normal play of the carrier during ramming of themold, said piston and cylinder serving as a cushion for up and downmovements of the carrier during rock-over operations.

15. In a combination jolt-ramming and rock-over machine, the combinationwith a reciprocating jolting carrier, and a rockover table carriedthereby, of a safety cushion stop cooperating with the carrier to arrestit and the rock-over table when the latter has been rocked over.

16. In a combination jolt-ramming and rock-over machine, the combinationwith a reciprocating jolting carrier, and a rockover table carriedthereby, of a safety cushion stop comprising an abutment and a springwhich normally extends beyond the abutment, said spring and abutmentcooperating with the carrier to arrest it and the rock-over table, witha cushioning action, when the table has been rocked over.

In testimony whereof, I hereunto affix my signature.

WILLIAM (J. NonoRoss.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

